cmake_minimum_required(VERSION 3.10)

# set the project name
project(Tutorial VERSION 1.0)

option(USE_MYMATH "Use tutorial provided math implementation" ON)

# configure a header file to pass some of the CMake settings
# to the source code
configure_file(TutorialConfig.h.in TutorialConfig.h)

if(USE_MYMATH)
    add_subdirectory(MathFunctions)
    list(APPEND EXTRA_LIBS MathFunctions)
    list(APPEND EXTRA_INCLUDES "${PROJECT_SOURCE_DIR}/MathFunctions")
endif()

# add the executable
add_executable(Tutorial tutorial.cxx)

target_link_libraries(Tutorial PUBLIC ${EXTRA_LIBS})

# add the binary tree to the search path for include files
# so that we will find TutorialConfig.h
target_include_directories(Tutorial PUBLIC
        "${PROJECT_BINARY_DIR}"
        ${EXTRA_INCLUDES}
        )

# specify the C++ standard
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED True)


# the process on how to build the module
# 1
# cd xx/Step2/v1/build/
# cmake ../../v1/  or cmake ../../v1/ -DUSE_MYMATH=OFF
# cmake --build .
# Tutorial 9
# Tutorial 16
# Tutorial